Kantowski-Sachs spherically symmetric solutions in teleparallel $F(T)$ gravity

TL;DR

This paper explores new exact and approximate solutions in teleparallel $F(T)$ gravity for Kantowski-Sachs spacetime, considering vacuum and perfect fluid scenarios, with potential implications for cosmology.

Contribution

It introduces novel teleparallel $F(T)$ solutions for Kantowski-Sachs spacetime, expanding the understanding of anisotropic cosmological models in modified gravity.

Findings

New non-trivial vacuum solutions in $F(T)$ gravity.

New solutions with perfect isotropic fluid, including linear and non-linear equations of state.

A variety of exact and approximate solutions relevant for cosmological models.

Abstract

In this paper, we investigate time-dependent Kantowski-Sachs spherically symmetric teleparallel $F(T)$ gravity in vacuum and in a perfect isotropic fluid. We begin by finding the field equations and solve for new teleparallel $F(T)$ solutions. With a power-law ansatz for the coframe functions, we find new non-trivial teleparallel $F(T)$ vacuum solutions. We then proceed to find new non-trivial teleparallel $F(T)$ solutions in a perfect isotropic fluid with both linear and non-linear equation of state. We find a great number of new exact and approximated teleparallel $F(T)$ solutions. These classes of new solutions are relevant for future cosmological applications.